Give default positioning for dot repha 0D4E

Negative offset
Rachana- Glyphs for DOT REPH (04DE)

TODO: Ligatures ending with virama does not work properly
Eg: dotreph ch1 xx ch1 xx
[Rachana] Round the position points to int
Fix ാം rendering

Defined a sequnce 25cc+0d3e+od02 and mapped it to a ligature
consisting of AA vowel sign and Anuswaram.
[Meera] Fix bug in y1xxy1xx rendering

യ്യ്  was rendering wrong with ya sign. Akhn rule was missing
for യ്യ
Reinstate 'half' rules - needed for ICU Layout Engine :-(. This reverts 14bb0fd64467

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Reinstate 'pres' rules in combination with 'half' for La, Ya and Va.
Needed for pango <=1.30 and ICU Layout engine :-(.
Test case is മുഖ്യമന്ത്രി

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Fix dotreph vva (dotreph v1 xx v1)

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Add akhn also for vva

ഉവ്വ് was failing without this
Fix dotrephy1yy1 using psts

Added a glyph dotreph+y1 and then used psts rule dotrephy1 y2
to get correct dotrephy1y1 rendering
Corrected the mapping for the glyph 'dotrephjju'

The glyph 'dotrephjju' was having the wrong ligature mapping and
glyph name,corrected it by changing to 'dotrephch3ch3u1'.
Also corrected the glyph name of 'dotrephjja'.
Rachana,Meera: More fixes to <Va,Virama,Va>, <Ya,Virama,Ya> cases

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Use 'psts' rule instead of 'akhn' for ligatures involving ു, ൂ, ൃ

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Use 'psts' instead of 'akhn' for <dotreph,ch3,u1>

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: 'akhn' to 'psts' correction for ൎതൃ, ൎത്തൃ

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: 'akhn' to 'psts' correction for ൎന്നു, and add ൎന്നൂ

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Add glyph ൎദ and change 'akhn' to 'pres' for ൎദ്ര

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Introduce 'akhn' rule for 'mlm2' spec

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Introduce 'pref' rule for <Virama,Ra> and equivalent 'pres' rule per 'mlm2' spec

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
Rachana: Introduce 'blwf' rule for <Virama,La> and change 'blws' rule to include 'mlm2' spec also

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>